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Technical Documentation

Edition: 11-2010
Version: 1

Article no.: 233571

Gems Sensors

& Controls



One Cowles Rd



Plainville



CT



Telephone 800-378-1600

XT-1000

The magnetostrictive level sensor

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Summary of Contents for XT-1000

Page 1: ...Technical Documentation Edition 11 2010 Version 1 Article no 233571 Gems Sensors Controls One Cowles Rd Plainville CT Telephone 800 378 1600 XT 1000 The magnetostrictive level sensor ...

Page 2: ...Page 2 19 XT 1000 ...

Page 3: ...nstallation on the bypass 10 5 Electrical connection 12 6 User configuration 14 6 1 Measuring span at the level sensor 14 6 2 Current consumption in failure mode 16 7 Technical data 17 7 1 Sensor 17 7 2 Floats 19 Copyright Reproduction and translation only with the written consent of GEMS Sensors Controls GEMS Sensors Controls reserves the right to carry out product alterations without prior notic...

Page 4: ... the range 4 to 20 mA Available in lengths of 8 to 19 it is compatible with a variety of tank dimensions It also comes in the following versions Version for installation on a bypass with magnetic float Version with flange Version with screw in unit for infinitely variable positioning of the level sensor The Ex approved version of the level sensor can be installed in potentially explosive atmospher...

Page 5: ...e prior consent of the manufacturer The installation operation and maintenance of the level sensor must be carried out only by expert authorized personnel Specialized knowledge must be obtained by undergoing regular training Operators installers and service technicians must comply with all applicable safety regulations This also applies to any local safety regulations and accident prevention regul...

Page 6: ... or M12 plug in connection at the top of the sensor head and by ground connector 4 at the bottom of the sensor head see Installation and User configuration Probe tube 5 features a screw in unit 6 cutting ring or sealing gland coupling for height adjustment capability or a flange not shown for fixed installation Float 7 is the key component for continuous gauging of the product filling level or bou...

Page 7: ...sensor Its magnetic field applies an axial magnetic field to the wire The superposition of the two magnetic fields produces a torsional wave 5 at the float position which then propagates along the wire in both directions One wave propagates directly to the sensor head the other propagates down to the bottom of the probe tube and is reflected The time between the current pulse being transmitted and...

Page 8: ...ve application Also observe any local safety regulations and accident prevention regulations which are not stated in these operating instructions This section describes how to install the level sensor The procedures for each version are described separately see Figure 3 Figure 3 XT 1000 versions ...

Page 9: ...ensor head end to enable correct measurements to be made 4 1 Installation with screw in unit Figure 4 installation with screw in unit Removal of the float is necessary only if the float does not fit through the installation opening in the tank Otherwise please proceed directly to steps 3 6 and if applicable 7 Insert the level sensor into the tank see Figure 4 1 Loosen both set screws remove collar...

Page 10: ... nut has been tightened In this event it would be necessary to return the level sensor to the factory to have the probe tube replaced 4 2 Installation with flange The probe tube is permanently welded to the flange which means that the installation length cannot be altered Secure the flange using the flange screws If the float does not fit through the installation opening refer to the related insta...

Page 11: ...tween probe tube and float center max distance from the SureSite float SureSite float Probe tube fitted without tension undeformed SureSite housing Magnet position SECTION A A Spacer bracket max magnet position min magnet position Measuring range min 2 76 min 1 97 Probe fixture nonmagnetic ...

Page 12: ...ad and probe tube of XT 1000 Standard are made of stainless steel The level sensor without Ex approval is installed in accordance with the following wiring diagram Figure 6 wiring diagram for XT 1000 To connect the level sensor see Figures 7 Unscrew sensor head cap 1 using an open ended spanner Loosen union nut 2 of screwed cable gland 3 Figure 7 connecting the XT 1000 level sensor Emax Line resis...

Page 13: ... polarity Configuration of reference points if necessary see section 6 1 Screw the sensor head cap 1 back on The ground connector on the underside of the sensor head can be used for grounding or equipotential bonding Protect the sensor head against the ingress of water An external cable diameter of 0 2 to 0 4 mm ensures reliable sealing of the cable entry Make sure that the cable gland is screwed ...

Page 14: ...nsor base and 20 mA at the sensor head The measuring span is configurable for adaptation to the tank concerned However a minimum clearance of 0 4 must be observed If this minimum clearance is not observed the display direction of the level sensor will be reversed automatically ullage measurement Through configuration it is also possible to have the measured value output inverted e g the level sens...

Page 15: ...t consump tion of 20 mA at this position When the 4 mA button is pressed the LED goes out for 5 seconds When the 20 mA button is pressed the LED lights up permanently for 5 seconds The sensor then remains in configuration mode for a further 15 seconds before storing the change and reverting to measuring mode The new measuring range configuration is not stored until the level sensor reverts from ad...

Page 16: ...p permanently Ifailure 21 5 mA if the LED goes out Ifailure 3 6 mA If no button is pressed again the level sensor remains in failure mode for a further 2 5 seconds before reverting to measuring mode and discarding the change To set a current consumption of 3 6 mA during the dwell period 10 s in failure mode briefly press 4 mA button 2 0 1 to 2 seconds To set a current consumption of 21 5 mA during...

Page 17: ...cutting ring coupling 3 Ansi Flange 2 NPT screw in unit Sensor head Height 4 53 Diameter 1 97 Index of protection IP 68 Material stainless steel Cable diameter 0 2 to 0 4 Temperature 40 F to 185 F Probe tube Length 8 to 19 to order Diameter 47 Material 1 4571 standard titanium Hastelloy C or other materials on request Measuring range freely configurable 0 4 Normal temperature NT 40 F to 250 F High...

Page 18: ...rity better than 0 04 mm or 0 025 better than 0 001 per K Repetition accuracy better than 0 004 Resolution better than 0 002 Accuracy Bypass HT HHT digital component Linearity better than 0 08 or 0 1 better than 0 001 per K Repetition accuracy better than 0 02 Resolution better than 0 002 Accuracy Analog component Linearity better than 0 01 Temperature drift better than 0 01 per K Resolution bette...

Page 19: ...suitable for use at a pressure of 1 bar vacuum Excerpt from available float range min density of medium g cm Material max operating pressure bar at 68 F Shape 0 5 0 6 0 7 0 7 0 85 0 95 Titanium 1 4571 316 Ti 1 4571 316 Ti C276 1 4571 316 Ti 1 4571 316 Ti 20 20 16 10 20 50 Ball ø 50 Ball ø 52 Cylinder ø 43 Cylinder ø 46 Ball ø 43 Ball ø 43 above 120 F the maximum operating pressure decreases Pressu...

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